|Title|Alternate Title(s)|Year|Manufacturer|Genre(s)|Max. Players|
|---|---|---|---|---|---|
|Ocean Hunter, The|—|1998|Sega|Shooting gallery|2|
|Off Road Challenge|—|1997|Midway|Racing|1|
|Off Road Thunder|—|2000|Midway|Racing|1|
|Off The Wall|—|1991|Atari Games|Breakout|2|
|Oh My God!|—|1993|Atlus|Puzzle|2|
|Oishii Puzzle Wa Irimasen Ka|—|1993|Sunsoft|Puzzle|2|
|Oli-Boo-Chu|—|1982|Irem||2|
|Ollie King|—|2004|Smilebit|||
|Omega Fighter|—|1989|UPL|Scrolling shooter|2|
|Omega Race|—|1982|Midway|Multidirectional shooter|1|
|One Shot One Kill|—||Playmark|Shooting gallery|2|
|Onna Sansirou - Typhoon Gal|—|1985|Taito||2|
|Operation Thunderbolt|—|1988|Taito|Shooting gallery|2|
|Operation Tiger|—|1998|Taito|Shooting gallery|2|
|Operation Wolf|—|1987|Taito|Shooting gallery|2|
|Operation Wolf 3|—|1994|Taito|Shooting gallery|2|
|Orbit|—|1978|Atari|Multi-directional shooter|2|
|Ordyne|—|1988|Namco|Scrolling shooter|2|
|Oriental Legend|—|1997|International Game System|Beat 'em up|4|
|Osman|Cannon Dancer|1996|Mitchell Corporation|Platformer|1|
|Otomedius|—|2007|Konami|Scrolling shooter||
|Outfoxies, The|—|1995|Namco|Shoot'em up/ Fighting game|2|
|Outlaw|—|1976|Atari|Shooter|1|
|OutRun|—|1986|Sega AM2|Racing|1|
|Out Zone|—|1990|Toaplan|Scrolling shooter|2|
|OutRun 2|—|2003|Sega AM2|Racing|1|
|OutRunners|—|1993|Sega AM1|Racing|2|
|Outtrigger|—|1999|Sega AM2|First Person Shooter||
|Over Drive|—|1990|Konami|Racing|1|
|Over Rev|—|1997|Jaleco|Racing|2|
|Over Top|—|1996|Alpha Denshi|Racing|2|
|Ozma Wars|—|1978|SNK|Fixed shooter|2|

Question: how many arcade games were released in 1987?
Answer: 1